I had been running a straight pipe for a few months now and could not take any more. Too much drone and the tone was too raspy.
I had Rip Rook (and associate) install a 24 inch Diamond Eye muffler and a resonator in place of the cat. I am extremely pleased! The sound is deeper and throatier and no longer raspy. Best of all the drone is gone.
I now have more control over the sound level of the truck. If I behave the truck is quiet and civilized. But when I stomp on it the sound is very pleasant.
Overall, I am very pleased with the results. My only regret is not doing this sooner.